media: saa7164: constify pci_device_id

pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/saa7164/saa7164-core.c

@@ -1490,7 +1490,7 @@ static void saa7164_finidev(struct pci_dev *pci_dev)
 	kfree(dev);
 }
 
-static struct pci_device_id saa7164_pci_tbl[] = {
+static const struct pci_device_id saa7164_pci_tbl[] = {
 	{
 		/* SAA7164 */
 		.vendor       = 0x1131,